Missing PDFDictionary entry "Parent" (Copying PDF page with some annotations)

[tema4p]

Hi guys, I really appreciate your efforts in making our world better, at least with PDF part.
I worked a lot with your library (as well as with PDFAssembler) and will add some feedback soon.

But I've met some strange error when trying to copy from or add to pages to PDF files with some annotations.
test_text_annot.pdf

I use pdf-lib (0.6.3) in browser, investigated the issue and reviewed your code, but still can't figure out the problem, please help.

ERROR Error: Missing PDFDictionary entry "Parent".

I'll continue investigating and any support here would be great, thanks!

[Hopding]

Hello @tema4p! I'm glad you are finding pdf-lib useful. I look forward to your feedback.

I was able to reproduce this issue. It looks like the problem is caused by some page objects missing a required key (/Parent). The file you shared has a couple couple of pages with another missing key as well (/Resources), though this isn't the cause of the error. Technically, these missing keys make the file you shared invalid.

I'll work on a fix for this. I'll try to get it published within a couple of days. However, the the beta release doesn't have this problem, and is able to copy the PDF without any errors. I'd recommend you try it out.

[Hopding]

I just released version 0.6.4. The full release notes are available here.

You can install it with npm:

npm install --save pdf-lib@0.6.4

or yarn:

yarn add pdf-lib@0.6.4

It's also available on the unpkg CDN:

• https://unpkg.com/pdf-lib@0.6.4/dist/pdf-lib.js
• https://unpkg.com/pdf-lib@0.6.4/dist/pdf-lib.min.js

[Hopding]

@tema4p Please let me know if the fix works for you.

[tema4p]

@Hopding Thank you a lot!
That fixed my issue.
Sorry for the late response.
I'll try beta version and let you know!
Thanks again!